Tuner SCT

[raptor4122]

while keeping changing Tunes , will it effect Fuel pump ??? and how often can i change it and wont effect anything

 

[Chris@FreedomMotorsports]

The biggest thing you need to keep in mind about changing your tuning is to allow time for the ECM and tranmisssion to "learn" the tune. Every time you flash the ECM you start fresh with fresh data in the ECM, because of this, you are at higher risk of damaging parts. The fuel pump isn't really an issue, but slipping the transmission can be. For example, if you flash in your performance tune and immediately begin hammering it to test the tune, taking off at WOT at every stop, etc. Once you are done playing, under normal throttle, you are going to have hard shifts that are very hard to deal with and you could think something is wrong because the ECM has learned the shifting points for the wide open throttle acceleration. You need to allow at least 100 miles of regular driving conditions in each tuning level before you will really experience the most positive benefits from each tune. Other than that, tuning with these vehicles for the most part is very safe and should hurt anything that doesn't already have an underlying problem that could be brought to the surface by the requirements of the tune.

 

[mudblood]

The biggest thing you need to keep in mind about changing your tuning is to allow time for the ECM and tranmisssion to "learn" the tune. Every time you flash the ECM you start fresh with fresh data in the ECM, because of this, you are at higher risk of damaging parts. The fuel pump isn't really an issue, but slipping the transmission can be. For example, if you flash in your performance tune and immediately begin hammering it to test the tune, taking off at WOT at every stop, etc. Once you are done playing, under normal throttle, you are going to have hard shifts that are very hard to deal with and you could think something is wrong because the ECM has learned the shifting points for the wide open throttle acceleration. You need to allow at least 100 miles of regular driving conditions in each tuning level before you will really experience the most positive benefits from each tune. Other than that, tuning with these vehicles for the most part is very safe and should hurt anything that doesn't already have an underlying problem that could be brought to the surface by the requirements of the tune.

That is some of the best advice I have seen on this site. ECM's take a while to "learn" the tune. Good job Chris!!

 

[NickPic83]

Very good info Chris!

Sent from my XT1080 using Tapatalk

 

[Hockster]

The only thing that can really affect your fuel pump is driving with very low fuel levels. The fuel pump is bathed in fuel to help keep it cool. Tunes will not hurt the pump, since the tuner does not change anything in the fuel delivery system. Working for 6 years in the Escape/Tribute powertrain calibration i've had lots of experience with building calibration strategy and PCM flashing. There is a relearn process that should be used anytime you disconnect the battery or reflash the PCM.
Big J has a post about what steps you should follow.
http://www.fordraptorforum.com/f7/how-reset-your-ecu-after-any-performance-modification-6788/

 

[MTF]

The new 2010 1/2 and up PCM, cycles (fuel trims) on it's own every 50 miles, and the transmission strategy cycles every 300 miles.

But disconnecting the battery with every Tune change is the proper way to do that, it forces the PCM to start a new cycle.

 

[Chris@FreedomMotorsports]

The PCM cycles on it's own every 50 miles...

This is actually why I suggested allowing at least 100 miles for a regular relearn cycle, mainly because I didn't know what the actual relearn process as referred to/linked above were. Good info!

 

[mudblood]

This should be a sticky. Very important information.